Perhaps you should try some spelling variations:
rand » brand, grand, band
grandts » gbrandts, ggrandts, gbandts, granddts, irandts, grawdts, grants, grandes
grant » grants, grandt, irant, grawt
gran » grand, iran, graw
drains » drain, grains, trains, dmains, dgains, drails
grain » gmain, ggain, grail
brain » bmain, bgain, brail
rain » main, gain, rail
rank » ranks, frank

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((rand or (hard or had)) or (bank or land)) or (((((grant or raytd) or ray) or (gran OR grain)) or (grant or (drains or (brain or rain)))) or (((ggaint or grandts) or rank) or raw))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((rand OR (hard OR had)) OR (bank OR land)) OR (((((grant OR raytd) OR ray) OR (gran OR grain)) OR (grant OR (drains OR (brain OR rain)))) OR (((ggaint OR grandts) OR rank) OR raw))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((rand or (hard or had)) or (bank or land)) or (((((grant or raytd) or ray) or (gran OR grain)) or (grant or (drains or (brain or rain)))) or (((ggaint or grandts) or rank) or raw))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((rand or (hard or had)) or (bank or land)) or (((((grant or raytd) or ray) or (gran OR grain)) or (grant or (drains or (brain or rain)))) or (((ggaint or grandts) or rank) or raw))) counterinsurgency study ;*.